AL-BairaqScience in Sports 5th cycle

Abdulrahman BuhendiBelal Al-AbdullaMohamed Sayed Ahmed Abdullah Ibraheem

Outline

• Introduction• Activity 1: Hunting for Objects Made of Concrete• Activity 2: Comparing Different Kinds of Cements• Activity 3: Comparing Different Concrete

Formulations• Design project: Making concrete ball

Introduction• Definition of concert:

Concrete is a formulation made of mixing cement, water and aggregates together. Concrete is very strong and hence its used in infrastructure

sand Gravel Water cement

Activities 1:Hunting for objects made of concrete

• Objects and structures made out of concrete includes:1. Buildings2. Bridges3. Roads

Activity 2: Comparing Different kinds of Cements

Objectives Make three cement formulations and compare the effect of adding additives on cement hardening

Materials:1. Portland cement2. Water 3. CaCl2

4. Sugar

Results and Conclusion

1. Sample B hardened slower that than the other samples2. Sample C was the first sample to hardened 3. CaCl2 can be used to make the hardening rate of cement faster hence it

is considered as a catalyst

Sample Portland cement g

Water ml Salt CaCl2 g

Sugar g

A 200 100 0 0B 200 100 0 6C 200 100 1 0

Activity 3: Comparing Different Concrete Formulations

• Objectives:Determining the strongest concrete formula based on its density • Procedure :

Activity 3: Comparing Different Concrete Formulations

We measured the density using D=

Type of sample

Mass of sample g

Volume of sample

Density g/

Sample 1 : coarse aggregate

100 72 100/72=1.45

Sample 2: Fine Aggregate

100 67 100/67=1.48

Sample 3: Mixed Aggregate

100 g(50+50)

61 100/61=1.69

Results

ConclusionVolume is inversely proportional to the density which leads to:1-The mixture with the least volume will have high density. 2- The coarse aggregate should to be half the total aggregates

Designing project: Concrete Bowling Ball

• Our target to make a ball that weights less than 5 Kg• Materials used• Cement• Water• Fly ash• Silica• aggregate

Concrete Balling BallTrails

• Two trials

Trail Weight Kg Result

1 7.5 Fail2 5.250 Pass

Material Cement Kg Sand Kg Fly ash g Silica g Water ml

Amount 1.150 2.5 500 550 800

Acknowledgment

Many thanks to my teachers, school and AL-Bairaq team from Center for Advanced Materials (CAM), Qatar University for supporting us during our journey with a AL-Bairaq.

Also, I would like to thank the sponsors UNESCO, Qatar National Commission, Ras Gas and Shell.